Protector-guard for tension-pulleys of textile-machines.



M. SPENCER. PROTEGTOR GUARD FOB. TENSION PULLEYS 0F TEXTILE MACHINES.-

APPLICATION FILED UNE 1, 1914.

Patented Mar. 9, 1915.

Jnven %07".

%6@3 5fpencen MOSES SPENCER, 0F SAYLESVILLE, RHOJDJE ISLAND.

FFI

PROTECTOR-GUARD FOR 'IENSION-JPULLEYS 01E TEXTILE-MACHINES.

Application filed June 1, 19M. Serial No. 841,972.

To all whom it may concern Be it known that I, Moses SPENCER, a

citizen of the United States, residing at Saylesville, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Protector-Guards for Tension-Pulleys of Textile-Machines, of which the following is a.

specification.

This invention relates to means for excluding lint and fibrous matter from the shaft or axle and bearings of rapidly revoluble exposed take-up tension pulleys employed in connection with textile spinning, twisting, winding and spooling machines, and it consists essentially in providing pulleys of the type referred to with relatively stationary oppositely disposed outer side guard-plates or disks positioned contiguous to and inclosing portions of the pulley, substantially as hereinafter set forth and claimed.

In automatic textile spinning machines, as usually constructed, the spindles thereof are revolubly mounted in a pair of laterally separated horizontal bolster-rails, the spindles-being positioned parallel with one another at substantially right angles to the plane of the bolster-rails, and having the spindles arranged in a series of independently controlled groups, each group comprising a. plurality of the spindles; a main driving-drum being revolubly mounted intermediate of and parallel with the bolster-rails. The spindles of each group are rotated by means of an endless, flexible band or tape passing around the peripheries of the driv ing-drum, tension-pulley and the spindlewhirls; the tension-pulley being revolubly supported in the lower end of a pivoted, swinging yoke or frame. A serious objec-. tion to the use of such former unprotected tension-pulleys is that matter such, for example, as loose pieces of yarn, roving loose ends, strings and lint or fly are liable to, and in fact do catch on the traveling band and are carried along by it, and as the edges of the band pass the contiguous inner surfaces of the yoke or frame supporting the tension-pulley more or-less of said loose pieces are thereby brushed or wiped ofl' and gradually accumulate and become wedged Specification of Letters Patent.

Patented Mar. 9, Idffi.

or clogged between the-hubs and sides of the pulley and e adjacent surfaces of the bearings and yoke. The presence of such accumulated matter acts to impede the action of the band in that it is caused to slip, thus slackening the normal speed of the corresponding spindles and producing uneven yarn or thread having what is termed a slack twist. In fact, more particularly in worsted spinning and twisting machines, such fibrous or foreign matter is often drawn onto the revolving pulley and packed into its bearings so tightly as to actually .stop the movement of the pulley. By means of my improvement the normal tendency of the device is to prevent the accumulation of said particles of matter, thereby not only overcoming the objections or disadvantages inherent in tension pulleys of this type as formerly employed, but at the same time decreasing the power or Working friction, while the degree of twist and tension imparted to the yarn is practically uniform throughout the loaded cop or bobbin.

In the accompanying sheet of drawings, showing an embodiment of my invention cooperating with a tension-pulley and contiguous portions of a textile spinning and twistingmachine, Figure 1 represents a side elevation of the pulley, provided with a dust guard and suspended from a swinging frame-or hanger in which the pulley is revolubly mounted; Fig. 2 is an edge elevation, portions being omitted; Fig. 3 is a vertical central section, taken on line 3 3 of Fig. 1; Fig. 4c is a partial side elevation, in reduced scale, showing a modification; and Fig. 5 is an enlarged vertical central section, taken on line 5 5 of Fig. 4, the supporting frame or hanger being omitted.

The following is a more detailed description of my invention, the same consisting essentially of a tension pulley for textile spinning and twisting machines provided with the mounted dust-guards.

The tension-pulley itself, A, has a rim (1 preferably provided with a slightly crowned face, a central web a, materially thinner or narrower than said rim, and a central hub a in which is secured a pin or axle a? having its end portions projecting through the hub a to form journals or trunnions.

The dust-guards B are each circular or disk-like and. having any suitable form, as concavo-convex, cross-sectionally; the center portion being provided with a hub b counter-bored from its inner face to snugly receive an anti-friction bushin member 6 in which the axle d revolves. lhe extreme outer diameter of the disk B, as represented, is somewhat less than the diameter of the pulley-rim, while the distance, transversely,

. etween the peripheral edges 6 e of the pair of positioned disks B is or may be mate-' rially less. than the width of the rim, as clearly indicated in Fig. 3. The respective edges 6 e and the corresponding part of the pulley form a narrow peripheral opening p between them when the respective faces of the parts a and b are normally positioned, a. a. slightly separated.

, The supporting arm or hanger C consists of front and back cheeks C C separable on the median line F2 a bolt 0 serving to accurately position and clamp the checks of the arm together. The latter may be into gral with the respective dust-guards or disks B as indicated.

The hanger proper is usually suspended from a weighted lever or arm, as m, axially movable on a stationary rod or bar at, the leverhaving a downward extension m to which the hanger is secured. I make no claim herewith to the hanger nor to means for mounting the same. I

In the practical operation of the foregoing elements the mounted tension-pulleys, etc are capable of being adjusted and actuated to produce in the .yarn right or left twist as desired; the improved protecting device operates equally well irrespective of the direction of rotation of the pulley. The normal relation of the guard disks to the revoluble tension-pulley is suchthat a peripheral opening 72 is formed between the outer edge of the guard and thecontiguous portion of the pulley, and through this opening the pulley freely revolves. I t may be added that bodily movable revoluble tension-pulleys of the general type illustrated herein are employed to automati- "cally compensate or take up the stretch of the traveling bands or tapes driving the respective'greups of spindles. The tensionpulley, therefore, is not a driving pulley,

but an idler or carrier pulley mounted to revolve on its axle fixed in'the hanger, or

the pulley may be secured to the mounted axle and revolve with it, the axle in such case being driven by means of the belt and pulley not a driver.

tensionlpulley; in either arrangement the is simply a carrier of the belt and In the modification illustrated in Figs.

4: and 5, the pulley-carrying axle d is revolubly mounted in bushings b secured in normally stationary bearing members 6* to which in turn are respectively fixed the protecting disks B. The pulley A, axle d, disks B and bearings 12 may be bodily removed from the supporting yoke 71. by first simply swinging the cap plates 71. on the pivot pins it so as to uncover the bearings b.

In my invention the guard-disks may be integral with or fixed to the bearing members so that the latter, including the disks, together with the tension-pulley, are capable of being readily removed bodily from the frame or yoke without segregation, and as readily replaced assembled in the frame.

I claim as my invention and desire to secure by U. S. Letters Patent 1. A guarddevice for tension-pulley mounts for textile spinning and twisting machines comprising the combination with a weighted, pivotally supported swinging hanger member provided with a pair of laterally separated arms having bearings in the free ends thereof, and a revoluble tension-pulley having a short axle mounted in said bearings, of a pair of metal guard disks disposed parallel with and adjacent to the respective lateral sides of the tension-pulley so as to prevent the accumulation in the bearings of loose fibrous matter, and having said guard disks arranged to swing or oscillate bodily with said hanger and pulley members.

.2. In a device of the general character described adapted for use in textile spinning and twisting machines, the combination of a tension-pulley mount arranged for swinging movements in a circular arc, said mount having a frame member integral therewith, a tension-pulley, means connected with said frame member for revolubly supporting said pulley therein, and a non-revoluble guard disk positioned contiguous to a side of the pulley, said guard member being secured to and encircling said pulley supporting means, substantially as described.

3. In mounts for tension-pulleys for use in spinning and twisting machines, arranged to automatically take up the slack of traveling endless bands rotating the tensionpulleys, a swinging frame member provided with horizontally disposed alining recesses, bearing members removably positioned in the said recesses, a tension-pulley having its axle supported in the bearing members, caps closing the outer ends of the bearings, and a pair of oppositely arranged disk-like guard members located contiguous to the respective sides of the tension-pulley, said guard members being secured to and extending radially from the said bearing members.

4. In a device of the character described, the combination of a frame member mounted for movement, a pair of spaced apart inwardly facing bearing members alining with each other longitudinally removably secured in the frame member, a tension-pulley disposed between the bearing members and revolubly journaled therein, and a pair of protector or guard-disks fixed to the said bearings respectively, said guard-disksbeing positioned adjacent to the outer lateral sides of the tension-pulley, constructed and arranged so that the assembled said pulley, bearing and guard members are capable of removal bodily from the frame member Without segregation.

In testimony whereof l[ have afifixed my signature in presence of two Witnesses.

MOSES SPENCER. Witnesses:

WM. H. ARMSTRONG,

CHARLES W. BOARDMAN. 

